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Method for preparing hollow metal nano-particle with gamma-aluminum oxide nano-particle as mould plate

A technology of metal nanoparticles and aluminum oxide nanometers, which is applied in the field of preparation of nanostructure materials, and achieves the effects of simple preparation process, easy operation and easy modification

Inactive Publication Date: 2008-12-03
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on the preparation of hollow metal nanoparticles using γ-Al2O3 nanoparticles as a template

Method used

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  • Method for preparing hollow metal nano-particle with gamma-aluminum oxide nano-particle as mould plate
  • Method for preparing hollow metal nano-particle with gamma-aluminum oxide nano-particle as mould plate
  • Method for preparing hollow metal nano-particle with gamma-aluminum oxide nano-particle as mould plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] First add 20mL dry toluene to the reaction flask, then add 1.3mL γ-mercaptopropyltriethoxysilane and 0.30g γ-Al 2 O 3 Nano particles were dispersed by ultrasonic, refluxed for 24 hours and then centrifuged / re-dispersed repeatedly with absolute ethanol to clean the particles, and the resulting product was dried at 50°C. Then add 0.18g of the above-mentioned silanized γ-Al to 5mL of palladium acetylacetonate in absolute ethanol solution (0.0302mol / L) 2 O 3 Nano-particles, ultrasonically dispersed, let stand for 30min, evaporate the absolute ethanol to dryness at low temperature, and then add to dioctyl ether and raise the temperature to 260℃ to remove Pd 2+ Reduced to metal Pd. Finally, the above-mentioned product was added to 20mL 40wt% HF solution at room temperature, ultrasonically dispersed, and then placed for 24h. Then, the nanoparticles were washed by repeated centrifugation / re-dispersion with deionized water and absolute ethanol successively, and the resulting particl...

Embodiment 2

[0016] Following the same procedure as in Example 1, using a 0.0532 mol / L palladium acetylacetonate solution in absolute ethanol, hollow palladium nanoparticles with a shell thickness of about 18 nm can be prepared.

Embodiment 3

[0018] Following the same procedure as in Example 1, using 0.0079 mol / L palladium acetylacetonate in anhydrous ethanol solution, hollow palladium nanoparticles with a shell thickness of about 3 nm can be prepared.

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Abstract

The invention discloses a method for preparing hollow metal nanometer particles by using gamma-Al2O3 nanometer particles as templates. The method comprises the following steps that: firstly, a silane coupling agent is used to perform surface modification to the gamma-Al2O3 nanometer particles, then the gamma-Al2O3 nanometer particles are added into a palladium acetylacetonate solution or a chlorogold acid solution, and finally hollow palladium or gold nanometer particles are produced by using 40wt percent HF solution to remove the gamma-Al2O3 nanometer particle templates. The method has the advantages that: the method takes the commercial gamma-Al2O3 nanometer particles as the templates; the surfaces of the gamma-Al2O3 nanometer particles are easy to modify with functional groups such as sulfhydryl groups or amidocyanogen and so on, by the silane coupling agent; the method is easy to promote to the preparation of hollow nanometer materials of other materials; and the method does not need high temperature or rigorous chemical treatment during the removal of the templates, and has simple preparation process and easy operation.

Description

Technical field [0001] The invention relates to the preparation of nano-structured materials, in particular to a method for preparing hollow metal nano-particles by using γ-alumina nano-particles as a template. Background technique [0002] As a new type of ordered structured nanomaterial, hollow nanoparticles have some unique properties such as low density, large specific surface area, good thermal stability and strong surface permeability, presenting special functions that conventional materials do not have. Therefore, it is widely used in many fields such as drug slow release, coatings, catalysis, chromatographic separation, micro-nano reactors, sensors, electronics and photoelectric materials. [0003] At present, many ingenious methods have been developed to prepare hollow nanoparticles, such as template method, self-assembly method, hydrothermal method, sonochemical method, nozzle reactor method, etc. Among them, the template method is the most intuitive and effective prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/00C09C3/12
Inventor 陈义旺黄忠福周魏华贺晓慧郭祖鹏
Owner NANCHANG UNIV
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